<template>
	<div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>参数列表</el-breadcrumb-item>
    </el-breadcrumb>
   <el-card>
      <!-- 警告区域 -->
      <el-alert show-icon title="注意：只允许为第三级分类设置相关参数！" type="warning" :closable="false"></el-alert>

      <!-- 选择商品分类区域 -->
      <el-row class="cat_opt">
        <el-col>
          <!-- <span>选择商品分类：</span> -->
          <!-- 选择商品分类的级联选择框 -->
<!--           <el-cascader 
          expand-trigger="hover" 
          :options="catelist" 
          :props="cateProps"
           v-model="selectedCateKeys" @change="handleChange">
          </el-cascader> -->
		  <span class="demonstration">选择商品分类1：</span>
		  <el-cascader
		 	 expand-trigger="hover" 
		    v-model="selectedCateKeys"
		    :options="catelist"
		    :props="cateProps"
		    @change="handleChange">
		    </el-cascader>
        </el-col>
      </el-row>
<el-tabs v-model="activeName" @tab-click="handleTapClick">
    <el-tab-pane label="动态参数" name="many">
 <el-button type="primary" size="mini" :disabled="isBtnDisabled" @click="addDialogVisible=true">添加参数</el-button>

	  <!-- 动态参数表格 -->
          <el-table :data="manyTableData" border stripe>
            <!-- 展开行 -->
            <el-table-column type="expand">
            	<template slot-scope="scope">
                <!-- 循环渲染Tag标签 -->
                <el-tag v-for="(item, i) in scope.row.attr_vals" :key="i" closable @close="handleClose(i, scope.row)">{{item}}</el-tag>
                <!-- 输入的文本框 -->
                <el-input 
                class="input-new-tag" 
                v-if="scope.row.inputVisible"
                 v-model="scope.row.inputValue"
                  ref="saveTagInput" size="small" 
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                   @blur="handleInputConfirm(scope.row)">
                </el-input>
                <!-- 添加按钮 -->
                <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
              </template>
            </el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index"></el-table-column>
            <el-table-column label="参数名称" prop="attr_name"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeParams(scope.row.attr_id)">删除</el-button>
              </template>
            </el-table-column>
          </el-table>

    </el-tab-pane>
   <el-tab-pane label="静态属性" name="only">
          <!-- 添加属性的按钮 -->
          <el-button type="primary" size="mini" :disabled="isBtnDisabled" @click="addDialogVisible=true">添加属性</el-button>
          <!-- 静态属性表格 -->
          <el-table :data="onlyTableData" border stripe>
            <!-- 展开行 -->
            <el-table-column type="expand">
              <template slot-scope="scope">
                <!-- 循环渲染Tag标签 -->
                <el-tag v-for="(item, i) in scope.row.attr_vals" :key="i" closable @close="handleClose(i, scope.row)">{{item}}</el-tag>
                <!-- 输入的文本框 -->
                <el-input class="input-new-tag" 
                v-if="scope.row.inputVisible"
                 v-model="scope.row.inputValue"
                  ref="saveTagInput" size="small"
                   @keyup.enter.native="handleInputConfirm(scope.row)" 
                   @blur="handleInputConfirm(scope.row)">
                </el-input>
                <!-- 添加按钮 -->
                <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
              </template>
            </el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index"></el-table-column>
            <el-table-column label="属性名称" prop="attr_name"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeParams(scope.row.attr_id)">删除</el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
</el-tabs>
   </el-card>

	    <el-dialog :title="'添加' + titleText" :visible.sync="addDialogVisible" width="50%" @close="addDialogClosed">
      <!-- 添加参数的对话框 -->
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px">
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="addForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addParams">确 定</el-button>
      </span>
    </el-dialog>

	<!-- 修改参数的对话框 -->
    <el-dialog :title="'修改' + titleText" 
    :visible.sync="editDialogVisible" 
    width="50%" @close="editDialogClosed">
      <!-- 添加参数的对话框 -->
      <el-form :model="editForm"
       :rules="editFormRules" ref="editFormRef" label-width="100px">
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="editForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editParams">确 定</el-button>
      </span>
    </el-dialog>

	</div>
</template>

<script>
	export default {
		data() {
			return {
				editForm: {},
				editFormRules: {
			        attr_name: [
			          { required: true, message: '请输入参数名称', trigger: 'blur' }
			        ]
				},
				editDialogVisible: false,
				addForm: {
					attr_name: ''
				},
				addDialogVisible: false,
				activeName: 'many',
				catelist: [],
				cateProps: {
					value: 'cat_id',
					label: 'cat_name',
					children: 'children'
				},
				selectedCateKeys: [],
				manyTableData: [],
				onlyTableData: [],
				addFormRules: {
					attr_name: [
						{
							required: true, message: '请输入参数名称', trigger: 'blur'
						}
					]
				}
			}
		},
		created() {
			this.getCateList()
		},
		methods: {
			async getCateList () {
				const { data: res } = await this.$http.get('categories')
				if (res.meta.status !== 200) {
					return this.$message.error('获取商品分类失败！')
				}
				this.catelist = res.data
			},
			handleChange () {
				this.getParamsData()
			},
			handleTapClick () {
				console.log(this.activeName)
				this.getParamsData()
			},
		    async getParamsData() {
		      // 证明选中的不是三级分类
		      if (this.selectedCateKeys.length !== 3) {
		        this.selectedCateKeys = []
				this.manyTableData = []
		        this.onlyTableData = []
		        return
		      }

		      // 证明选中的是三级分类
		      console.log(this.selectedCateKeys)
		      // 根据所选分类的Id，和当前所处的面板，获取对应的参数
		      const { data: res } = await this.$http.get(
		        `categories/${this.cateId}/attributes`,
		        {
		          params: { sel: this.activeName }
		        }
		      )

		      if (res.meta.status !== 200) {
		        return this.$message.error('获取参数列表失败！')
		      }

				res.data.forEach(item => {
		        item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : []
		        // 控制文本框的显示与隐藏
		        item.inputVisible = false
		        // 文本框中输入的值
		        item.inputValue = ''
		      })

		      console.log(res.data)
		      if (this.activeName === 'many') {
		        this.manyTableData = res.data
		      } else {
		        this.onlyTableData = res.data
		      }
		    },
		    addDialogClosed () {
		    	this.$refs.addFormRef.resetFields()
		    },
		    addParams () {
		    	this.$refs.addFormRef.validate(async valid => {
		    		if (!valid) return false 
		    		const { data: res } = await this.$http.post(`categories/${this.cateId}/attributes`, {
		    			attr_name: this.addForm.attr_name,
		    			attr_sel: this.activeName
		    		})
		    		if (res.meta.status !== 201) {
		    			return this.$message.error('添加参数失败！')
		    		}
					this.$message.success('添加参数成功！')
			        this.addDialogVisible = false
			        this.getParamsData()
		    	})
		    },
		    editDialogClosed () {
		    	this.$refs.editFormRef.resetFields()
		    },
		    async showEditDialog (attr) {
				const { data: res } = await this.$http.get(
		        `categories/${this.cateId}/attributes/${attr}`,
		        {
		          params: { attr_sel: this.activeName }
		        }
		      )

		      if (res.meta.status !== 200) {
		        return this.$message.error('获取参数信息失败！')
		      }
		       this.editForm = res.data
		    	this.editDialogVisible = true
		    },
		    editParams () {
		    	this.$refs.editFormRef.validate(async valid => {
		    		if (!valid) return false
		    		const { data: res } = await this.$http.put(
			          `categories/${this.cateId}/attributes/${this.editForm.attr_id}`,
			          { attr_name: this.editForm.attr_name, 
			          	attr_sel: this.activeName }
			        )
			        if (res.meta.status !== 200) {
			          return this.$message.error('修改参数失败！')
			        }
					this.$message.success('修改参数成功！')
			        this.getParamsData()
			        this.editDialogVisible = false
		    	})
		    },
		   async removeParams (attr) {
		      const confirmResult = await this.$confirm(
		        '此操作将永久删除该参数, 是否继续?',
		        '提示',
		        {
		          confirmButtonText: '确定',
		          cancelButtonText: '取消',
		          type: 'warning'
		        }
		      ).catch(err => err)
		      // 用户取消了删除的操作
		      if (confirmResult !== 'confirm') {
		        return this.$message.info('已取消删除！')
		      }
		      // 删除的业务逻辑
		      const { data: res } = await this.$http.delete(`categories/${this.cateId}/attributes/${attr}`)
			if (res.meta.status !== 200) {
		        return this.$message.error('删除参数失败！')
		      }

		      this.$message.success('删除参数成功！')
		      this.getParamsData()
		    },
		    async handleInputConfirm (row) {
		    	if (row.inputValue.trim().length === 0) {
		    		row.inputValue = ''
		    		row.inputVisible = false
		    		return false
		    	}
		    	row.attr_vals.push(row.inputValue.trim())
		    	row.inputValue = ''
		    	row.inputVisible = false
		    	this.saveAttrVals(row)
			       },
		    showInput (row) {
		    	row.inputVisible = true
			      // 让文本框自动获得焦点
			      // $nextTick 方法的作用，就是当页面上元素被重新渲染之后，才会指定回调函数中的代码
			      this.$nextTick(_ => {
			        this.$refs.saveTagInput.$refs.input.focus()
			      })
		    },
		    handleClose (i, row) {
		    	row.attr_vals.splice(i, 1)
		    	this.saveAttrVals(row)
		    },
		  async saveAttrVals (row) {
		    	      // 需要发起请求，保存这次操作
     		 const { data: res } = await this.$http.put(
		        `categories/${this.cateId}/attributes/${row.attr_id}`,
		        {
		          attr_name: row.attr_name,
		          attr_sel: row.attr_sel,
		          attr_vals: row.attr_vals.join(' ')
		        }
		      )

		      if (res.meta.status !== 200) {
		        return this.$message.error('修改参数项失败！')
		      }

		      this.$message.success('修改参数项成功！')
		    }
		},
		computed: {
			isBtnDisabled () {
		      if (this.selectedCateKeys.length !== 3) {
		        return true
		      }
		      return false
			},
		    // 当前选中的三级分类的Id
		    cateId() {
		      if (this.selectedCateKeys.length === 3) {
		        return this.selectedCateKeys[2]
		      }
		      return null
		    },
		    titleText () {
		      if (this.activeName === 'many') {
		        return '动态参数'
		      }
		      return '静态属性'
		    }
		}
	}
</script>

<style lang="less" scoped>
.cat_opt {
  margin: 15px 0;
}
.el-popper {
	top:211px;
	left:728px;
}
</style>
